When adding a team with multiple players, it can lead to duplicate inserted in database which generate an error

[Dimfacion]

Description

When adding a team with multiple players, it can lead to duplicate inserted in database which generate an error.

Environment

1. OS (where OpenBAS server runs): { e.g. Mac OS 10, Windows 10, Ubuntu 16.4, etc. } All
2. OpenBAS version: { e.g. OpenBAS 1.0.2 } 1.6.1
3. OpenBAS client: { e.g. frontend or python } Frontend
4. Other environment details:

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. { e.g. Run ... } Add a team with at least 1 player already existing and added to the scenario
2. { e.g. Click ... } Import injects with that same team
3. { e.g. Error ... } Error 409 ""A different object with the same identifier value was already associated with the session : [io.openbas.database.model.ScenarioTeamUser#ScenarioTeamUserId(scenarioId=xxx, teamId=xxx, userId=xxx)]"
   "

Expected Output

Import Sucessful

Actual Output

Import in error

Additional information

Screenshots (optional)